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Check Engine Light Mystery on my 1993 Volvo 940 Wagon 900 1993

posted by  B.B. on  Thu Sep 5 17:34 CST 2024
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Dave,

Interesting notes on the 940 EGR setup.

After dealing with EGR headaches with the 850, I switched over to full synthetic
and switched again when I got back into red block engines. The full synthetic has been cleaning out all the mess from dyno oil and the interval between clear oil, and ugly blackremains of it's former life surviving on 1993 grade oil have been increasing with each oil change.
Do you feel that 940 EGR problems are aggravated by dyno oil, and feel like I do that Full Synthetic oil is way better for all auto engines?

Dyno oil pricing by the quart is more money than using Wally world full synthetic by the 5 quart jug, so now it's not a big price thing to upgrade to FS Oil.

Bill






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